Trolley.



PATENTED JUNE 9, 1908.

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UNITED STATES PATENT OFFICE.

TROLLEY.

Specification of Letters Patent.

Patented June 9, 1908.

Application filed October 9, 1907. Serial No. 396,569.

To all whom it may concern:

Be it known that I, SAMUEL D. HUNT, a citizen of the United States, residing at Youngstown, in the county of Mahoning and State of Ohio, have invented certain new and useful Improvements in Trolleys, of which the following is a specification.

This invention relates to an improvement in trolleys for electric railway systems, and has particularly in view a practical construction of trolley head or harp comprising means for maintaining an e'lfective contact with the feed wire or wires under all conditions, while at the same time guarding against the loss of contact with the feed wire or wires at curves and such other oints where trolleys are generally liable to leave the wire. In this connection, the invention provides a construction possessing special utility with main and auxiliary feed wires located at curves and other points to be specially guarded, and also beneath bridges and viaducts where the main feed wire is brought particularly low.

With these and other objects in view which will be readily apparent to those familiar with the art, the invention consists in the novel construction, combination and arrangement of parts hereinafter more fully described, illustrated and claimed.

In the accompanying drawings, exemplifying the preferred arrangement of parts;

Figure 1 is a side elevation of one form of trolley embodying the present invention and showing the general relation of parts to each other and to the main feed wire or conductor.

Fig. 2 is a front-view of the trolley head or harp illustrated in Fig. 1 and showing the operative relation thereof to main and auxiliary feed wires. at curves or other places. Fig. 8 is a side elevation of a practical form of the invention embodying a conventional type of trolley wheel for engagement with the main feed wire. Fig. 4 is a front view of the form of the invention shown in Fig. 3, and illustrating the relation of parts in connection with the main and auxiliary feed wires at curves or other places.

Like references designate corresponding parts in the several figures of the drawings.

The present invention contemplates asso ciating with the trolley pole 1 for an electricv motor car, a novel and practical form of trolley head or harp designed to be carried at the upper or outer end of the pole. This particular head or harp may be constructed in various ways, and in connection with different kinds of trolley elements for engagement with the feed wires, but in order to eX- emplify the scope of the invention in this connection, a special. form of construction that may be resorted to is suggested in Figs. 1 and 2 of the drawings. Referring to said Figs. 1 and 2 of the drawings, the trolley head or harp illustrated therein is shown as comprising in its organization a pair of upright rotatable trolley spools 3 journaled on the fixed to the upper or outer end of said pole 1. These spools are preferably duplicates in construction and each consists of an elongated body of a well defined dumb bell shape, and therefore embodying in its make up an intermediate longitudinally concaved or dished cylindrical bearin waist 5, and a pair of terminal contact hea s 6 and 7 arranged respectively at opposite ends of the waist portion 5. The said heads 6 and 70f the individual trolley spools are ofa spherical or spheroidal design, and therefore have a uniform balllike rolling contact with the feed wires engaged thereby, while the round lon- 'gitudinally concaved waists 5 of the spools likewise have an easy rolling contact with the feed wires when, under some conditions, they are brought into contact therewith. Preferably the op osite spools 3, and their supportin j ourna s 4 are set in upwardly divergent re ation, though in the embodiment of the invention shown in the drawing this relation may very nearly approach the arallel, or in fact be entirely or truly para lel, without departing from the scope thereof. However, in addition to the above referred to relation of the spools to eachother the same are usually both arranged at an inclination of about ten degrees from the perpendicular to secure the best results, though it will be understood that the angularity of the spools with respect to each other, and also in relation to the pole may be varied. The spools may be held upon their supporting ournals or spindles i by any suitable retaining means such as the nut retainer 8 shown in Fig. 2 of the drawings, and also preferably have a bearing at their lower ends in suitable bearing seats 8 rovided in a bearing plate 8 which may be suitably placed on t e end of the trolley pole. These structural details however may be varied to suit any particular condition under which the spools may be employed. The main upright supporting journals 4 suitably fitted feed wire or conductor 9 is illustrated in the drawings as being suspended from a centrally arranged hanger arm 12 carried by an arched hanger bracket 13, which bracket may also be conveniently provided at opposite sides of the support for the wire 9 with the op ositely located pendent bracket arms 14 an 15 to which are res ectively attached the auxiliary wires 10 an 11. These latter wires are shown as being located a material distance below the plane of the wire 9, and are designed to be strung for service, in connection with the main feed wire, at curves or other locations where it is desirable to guard against loss of contact between the trolley and the conductor or conductors.

A distinctive feature of the resent invention is that of the provision o a secure and effective cooperation between the trolley head or harp and the auxiliary wires 10 and 11 wherever these wires occur in the system. To provide for this the invention contemplates combining with the trolley spools the additional feature of providing the trolley head or har with a pair of 0 positely arranged su p emental trolley wl ieels 16 and 17 ourn -ed on suitable axles 18, and respectively engaging and rolling upon the said auxiliary wires 10 and 11, as may be plainly seen from Fig. 2 of the drawin s.

Under normal conditions, t e lower contact heads 7 of both spools 3 Will have an easy rolling contact under and against the main feed wire 9, but in the event of there being any tendency of the trolley to jump away from the main feed wire (at points where the auxiliary wires are not located) this would be effectually checked by the upper contact heads 6 coming into engagement with the main feed wire or conductor Also, in cases where the trolley is brought especially low, as for instance beneath bridges and viaducts, the said up er contact heads 6 will be tilted against the eed wire or conductor, and thus safeguard the trolley against loss of contact.

As already explained, the foregoing description details a special form of trolley Furthermore lateral thrust harp construction that may be resorted to in carrying out the invention, but it will be understood that instead of the specially shaped trolley s ools 3 referred to, any suitable or approve form of trolley element may be carr1ed by the pole for engaging the main feed wire. Hence, the inventionmay be carried out in a very simple and practical manner by combining the supplemental trolle wheels 16 and 17 with a smgle trolley whee 19 journaled in suitable bearings 20 carried at the outer or u per end of the ole, and contacting beneat -the main fee wire 9 in a common and well known manner.

From the foregoing it is thought that the construction, operation and advantages of the invention will be readily apparent without further description.

I claim 1. In a trolley system, the combination with the main feed wire and auxiliary side wires, of a trolley head having a main trolley element engaging beneath the main feed wire, and a pair of separate supplemental trolley wheels arranged to engage the auxiliary wires at the upper side of the latter.

2. In a trolley system, the combination with a main feed wire and auxiliary wires, of a trolley head having spools for engagement with the main wire, and a pair of su plemental wheels for engagement with t e auxiliary wires.

3. In a trolley system, the combination with a main feed wire and auxiliary side wires, of a trolley head having a pair of upright rotatable spools, and a air of o positely located supplemental tro ey whee s.

4. In a trolley system, the combination with a main feed wire and auxiliary Wires arranged below the latter, of a trolley head having a pair of upright rotatable spools, and below the plane of the latter also havin a pair of olppositely located supplementa tro ley whee s.

In testimony whereof I hereunto aifix my signature in the presence 'of two witnesses. SAMUEL D. HUNT.

Witnesses:

JOSEPH F. WILLIAMS, 0. M. RAMSEY. 

